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* nfsd4: typo logical vs bitwise negate in nfsd4_decode_share_accessBenny Halevy2011-11-011-1/+1
| | | | | Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfs41: implement DESTROY_CLIENTID operationMi Jinlong2011-10-241-1/+11
| | | | | | | According to rfc5661 18.50, implement DESTROY_CLIENTID operation. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: typo logical vs bitwise negate for want_maskBenny Halevy2011-10-241-1/+1
| | | | | Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: allow NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | ↵Benny Halevy2011-10-241-0/+2
| | | | | | | | | | | | NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED RFC5661 says: The client may set one or both of OPEN4_SHARE_ACCESS_WANT_SIGNAL_DELEG_WHEN_RESRC_AVAIL and OPEN4_SHARE_ACCESS_WANT_PUSH_DELEG_WHEN_UNCONTENDED. Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: implement new 4.1 open reclaim typesJ. Bruce Fields2011-10-191-0/+13
| | | | Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: typo logical vs bitwise negateDan Carpenter2011-10-171-1/+1
| | | | | | | | This should be a bitwise negate here. It silences a Sparse warning: fs/nfsd/nfs4xdr.c:693:16: warning: dubious: x & !y Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: move name-length checks to xdrJ. Bruce Fields2011-10-111-15/+30
| | | | | | Again, these checks are better in the xdr code. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: move access/deny validity checks to xdr codeJ. Bruce Fields2011-10-111-7/+73
| | | | | | | | I'd rather put more of these sorts of checks into standardized xdr decoders for the various types rather than have them cluttering up the core logic in nfs4proc.c and nfs4state.c. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: look up stateid's per clientidJ. Bruce Fields2011-09-261-1/+2
| | | | | | | | | | | | | | | | Use a separate stateid idr per client, and lookup a stateid by first finding the client, then looking up the stateid relative to that client. Also some minor refactoring. This allows us to improve error returns: we can return expired when the clientid is not found and bad_stateid when the clientid is found but not the stateid, as opposed to returning expired for both cases. I hope this will also help to replace the state lock mostly by a per-client lock, but that hasn't been done yet. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: assume test_stateid always has sessionJ. Bruce Fields2011-09-261-1/+1
| | | | | | | | Test_stateid is 4.1-only and only allowed after a sequence operation, so this check is unnecessary. Cc: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: match close replays on stateid, not open owner idJ. Bruce Fields2011-09-171-0/+1
| | | | | | | | | Keep around an unhashed copy of the final stateid after the last close using an openowner, and when identifying a replay, match against that stateid instead of just against the open owner id. Free it the next time the seqid is bumped or the stateowner is destroyed. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd41: try to check reply size before operationMi Jinlong2011-09-161-19/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | For checking the size of reply before calling a operation, we need try to get maxsize of the operation's reply. v3: using new method as Bruce said, "we could handle operations in two different ways: - For operations that actually change something (write, rename, open, close, ...), do it the way we're doing it now: be very careful to estimate the size of the response before even processing the operation. - For operations that don't change anything (read, getattr, ...) just go ahead and do the operation. If you realize after the fact that the response is too large, then return the error at that point. So we'd add another flag to op_flags: say, OP_MODIFIES_SOMETHING. And for operations with OP_MODIFIES_SOMETHING set, we'd do the first thing. For operations without it set, we'd do the second." Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> [bfields@redhat.com: crash, don't attempt to handle, undefined op_rsize_bop] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* NFSD: Cleanup for nfsd4_path()Trond Myklebust2011-09-131-28/+78
| | | | | | | | | | | | | | The current code is sort of hackish in that it assumes a referral is always matched to an export. When we add support for junctions that may not be the case. We can replace nfsd4_path() with a function that encodes the components directly from the dentries. Since nfsd4_path is currently the only user of the 'ex_pathname' field in struct svc_export, this has the added benefit of allowing us to get rid of that. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: split stateowners into open and lockownersJ. Bruce Fields2011-09-071-1/+1
| | | | | | | | The stateowner has some fields that only make sense for openowners, and some that only make sense for lockowners, and I find it a lot clearer if those are separated out. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: drop most stateowner refcountingJ. Bruce Fields2011-09-011-5/+6
| | | | | | | Maybe we'll bring it back some day, but we don't have much real use for it now. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: cleanup seqid op stateowner usageJ. Bruce Fields2011-08-311-5/+0
| | | | | | | | Now that the replay owner is in the cstate we can remove it from a lot of other individual operations and further simplify nfs4_preprocess_seqid_op(). Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: centralize handling of replay ownersJ. Bruce Fields2011-08-311-15/+19
| | | | | | | | | | | Set the stateowner associated with a replay in one spot in nfs4_preprocess_seqid_op() and keep it in cstate. This allows removing a few lines of boilerplate from all the nfs4_preprocess_seqid_op() callers. Also turn ENCODE_SEQID_OP_TAIL into a function while we're here. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: fix off-by-one-error in SEQUENCE replyJ. Bruce Fields2011-08-311-3/+3
| | | | | | | | | The values here represent highest slotid numbers. Since slotid's are numbered starting from zero, the highest should be one less than the number of slots. Reported-by: Rick Macklem <rmacklem@uoguelph.ca> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: cleanup and consolidate seqid_mutating_errJ. Bruce Fields2011-08-271-13/+1
| | | | Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: it's OK to return nfserr_symlinkJ. Bruce Fields2011-08-261-4/+0
| | | | | | | | | | | | | | | | | | | | | The nfsd4 code has a bunch of special exceptions for error returns which map nfserr_symlink to other errors. In fact, the spec makes it clear that nfserr_symlink is to be preferred over less specific errors where possible. The patch that introduced it back in 2.6.4 is "kNFSd: correct symlink related error returns.", which claims that these special exceptions are represent an NFSv4 break from v2/v3 tradition--when in fact the symlink error was introduced with v4. I suspect what happened was pynfs tests were written that were overly faithful to the (known-incomplete) rfc3530 error return lists, and then code was fixed up mindlessly to make the tests pass. Delete these unnecessary exceptions. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: clean up S_IS -> NF4 file type mappingJ. Bruce Fields2011-08-261-7/+14
| | | | | | | A slightly unconventional approach to make the code more compact I could live with, but let's give the poor reader *some* chance. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: fix seqid_mutating_errorJ. Bruce Fields2011-08-191-0/+12
| | | | | | | | | | | The set of errors here does *not* agree with the set of errors specified in the rfc! While we're there, turn this macros into a function, for the usual reasons, and move it to the one place where it's actually used. Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: turn on reply cache for NFSv4J. Bruce Fields2011-07-181-0/+11
| | | | | | | | | | | | | It's sort of ridiculous that we've never had a working reply cache for NFSv4. On the other hand, we may still not: our current reply cache is likely not very good, especially in the TCP case (which is the only case that matters for v4). What we really need here is some serious testing. Anyway, here's a start. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: call nfsd4_release_compoundargs from pc_releaseJ. Bruce Fields2011-07-181-8/+6
| | | | | | This simplifies cleanup a bit. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* NFSD: Added TEST_STATEID operationBryan Schumaker2011-07-151-3/+84
| | | | | | | | This operation is used by the client to check the validity of a list of stateids. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* NFSD: added FREE_STATEID operationBryan Schumaker2011-07-151-2/+30
| | | | | | | | This operation is used by the client to tell the server to free a stateid. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: make local functions staticDaniel Mack2011-05-181-1/+1
| | | | | | | | | | This also fixes a number of sparse warnings. Signed-off-by: Daniel Mack <zonque@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* NFSD: Remove unused variable from nfsd4_decode_bind_conn_to_session()Bryan Schumaker2011-04-291-5/+2
| | | | | | | | | | | | | | | Compiling gave me this warning: fs/nfsd/nfs4xdr.c: In function ‘nfsd4_decode_bind_conn_to_session’: fs/nfsd/nfs4xdr.c:427:6: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable] The local variable "dummy" wasn't being used past the READ32() macro that set it. READ_BUF() should ensure that the xdr buffer is pushed past the data read into dummy already, so nothing needs to be read in. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> [bfields@redhat.com: minor comment fixup.] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd v4.1 lOCKT clientid field must be ignoredAndy Adamson2011-04-291-2/+0
| | | | | | | | | | | | RFC 5661 Section 18.11.3 The clientid field of the owner MAY be set to any value by the client and MUST be ignored by the server. The reason the server MUST ignore the clientid field is that the server MUST derive the client ID from the session ID from the SEQUENCE operation of the COMPOUND request. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: wrong index used in inner loopMi Jinlong2011-03-171-4/+1
| | | | | | | | | | We must not use dummy for index. After the first index, READ32(dummy) will change dummy!!!! Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> [bfields@redhat.com: Trond points out READ_BUF alone is sufficient.] Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: wrong index used in inner looproel2011-03-081-2/+2
| | | | | | | | Index i was already used in the outer loop Cc: stable@kernel.org Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: correctly handle return value from nfsd_map_name_to_*NeilBrown2011-02-161-4/+4
| | | | | | | | | | | | | | These functions return an nfs status, not a host_err. So don't try to convert before returning. This is a regression introduced by 3c726023402a2f3b28f49b9d90ebf9e71151157d; I fixed up two of the callers, but missed these two. Cc: stable@kernel.org Reported-by: Herbert Poetzl <herbert@13thfloor.at> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: set sequence flag when backchannel is downJ. Bruce Fields2011-01-111-6/+2
| | | | | | Implement the SEQ4_STATUS_CB_PATH_DOWN flag. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: support BIND_CONN_TO_SESSIONJ. Bruce Fields2011-01-111-2/+32
| | | | | | | Basic xdr and processing for BIND_CONN_TO_SESSION. This adds a connection to the list of connections associated with a session. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: return nfs errno from name_to_id functionsJ. Bruce Fields2011-01-041-5/+5
| | | | | | This avoids the need for the confusing ESRCH mapping. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: move idmap and acl header files into fs/nfsdJ. Bruce Fields2011-01-041-2/+3
| | | | | | These are internal nfsd interfaces. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: remove some unnecessary dropit handlingJ. Bruce Fields2011-01-041-2/+0
| | | | | | We no longer need a few of these special cases. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: fix oops on secinfo_no_name result encodingMi Jinlong2010-12-291-4/+17
| | | | | | | | | | | | | The secinfo_no_name code oopses on encoding with BUG: unable to handle kernel NULL pointer dereference at 00000044 IP: [<e2bd239a>] nfsd4_encode_secinfo+0x1c/0x1c1 [nfsd] We should implement a nfsd4_encode_secinfo_no_name() instead using nfsd4_encode_secinfo(). Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: implement secinfo_no_nameJ. Bruce Fields2010-12-171-2/+13
| | | | | | Implementation of this operation is mandatory for NFSv4.1. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* NFSv4.1: Make sure nfsd can decode SP4_SSV correctly at exchange_idMi Jinlong2010-11-191-7/+15
| | | | | | | | | | | | | | | | | | | | | According to RFC, the argument of ssv_sp_parms4 is: struct ssv_sp_parms4 { state_protect_ops4 ssp_ops; sec_oid4 ssp_hash_algs<>; sec_oid4 ssp_encr_algs<>; uint32_t ssp_window; uint32_t ssp_num_gss_handles; }; If client send a exchange_id with SP4_SSV, server cann't decode the SP4_SSV's ssp_hash_algs and ssp_encr_algs arguments correctly. Because the kernel treat the two arguments as a signal sec_oid4 struct, but should be a set of sec_oid4 struct. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: adjust buflen for encoded attrs bitmap based on actual bitmap lengthBenny Halevy2010-10-011-6/+12
| | | | | | | | | The existing code adjusted it based on the worst case scenario for the returned bitmap and the best case scenario for the supported attrs attribute. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [bfields@redhat.com: removed likely/unlikely's] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-08-101-1/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits) no need for list_for_each_entry_safe()/resetting with superblock list Fix sget() race with failing mount vfs: don't hold s_umount over close_bdev_exclusive() call sysv: do not mark superblock dirty on remount sysv: do not mark superblock dirty on mount btrfs: remove junk sb_dirt change BFS: clean up the superblock usage AFFS: wait for sb synchronization when needed AFFS: clean up dirty flag usage cifs: truncate fallout mbcache: fix shrinker function return value mbcache: Remove unused features add f_flags to struct statfs(64) pass a struct path to vfs_statfs update VFS documentation for method changes. All filesystems that need invalidate_inode_buffers() are doing that explicitly convert remaining ->clear_inode() to ->evict_inode() Make ->drop_inode() just return whether inode needs to be dropped fs/inode.c:clear_inode() is gone fs/inode.c:evict() doesn't care about delete vs. non-delete paths now ... Fix up trivial conflicts in fs/nilfs2/super.c
| * pass a struct path to vfs_statfsChristoph Hellwig2010-08-091-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We'll need the path to implement the flags field for statvfs support. We do have it available in all callers except: - ecryptfs_statfs. This one doesn't actually need vfs_statfs but just needs to do a caller to the lower filesystem statfs method. - sys_ustat. Add a non-exported statfs_by_dentry helper for it which doesn't won't be able to fill out the flags field later on. In addition rename the helpers for statfs vs fstatfs to do_*statfs instead of the misleading vfs prefix. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nfsd: minor nfsd read api cleanupJ. Bruce Fields2010-07-301-1/+1
| | | | | | | | | | | | | | | | | | Christoph points that the NFSv2/v3 callers know which case they want here, so we may as well just call the file=NULL case directly instead of making this conditional. Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | nfsd4; fix session reference count leakJ. Bruce Fields2010-06-221-0/+1
|/ | | | | | | Note the session has to be put() here regardless of what happens to the client. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd4: implement reclaim_completeJ. Bruce Fields2010-05-131-1/+11
| | | | | | | This is a mandatory operation. Also, here (not in open) is where we should be committing the reboot recovery information. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd4: keep a reference count on client while in useBenny Halevy2010-05-131-1/+2
| | | | | | | | | | | | | | | Get a refcount on the client on SEQUENCE, Release the refcount and renew the client when all respective compounds completed. Do not expire the client by the laundromat while in use. If the client was expired via another path, free it when the compounds complete and the refcount reaches 0. Note that unhash_client_locked must call list_del_init on cl_lru as it may be called twice for the same client (once from nfs4_laundromat and then from expire_client) Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* Merge commit 'v2.6.34-rc6'J. Bruce Fields2010-05-041-5/+6
|\ | | | | | | | | Conflicts: fs/nfsd/nfs4callback.c
| * nfsd4: bug in read_bufNeil Brown2010-04-261-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When read_buf is called to move over to the next page in the pagelist of an NFSv4 request, it sets argp->end to essentially a random number, certainly not an address within the page which argp->p now points to. So subsequent calls to READ_BUF will think there is much more than a page of spare space (the cast to u32 ensures an unsigned comparison) so we can expect to fall off the end of the second page. We never encountered thsi in testing because typically the only operations which use more than two pages are write-like operations, which have their own decoding logic. Something like a getattr after a write may cross a page boundary, but it would be very unusual for it to cross another boundary after that. Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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